Triple Planar Heterojunction of SnO2/WO3/BiVO4 with Enhanced Photoelectrochemical Performance under Front Illumination

Bhat, Swetha S. M.; Lee, Sol A; Suh, Jun Min; Hong, Seungpyo; Jang, Ho Won

doi:10.3390/app8101765

Cited by 19 publications

(12 citation statements)

References 44 publications

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“…However, TiO 2 can only absorb the ultraviolet (UV) light because of its wide band gap of 3.2 eV, where UV light occupies only 5% of total solar spectrum [17]. Hence, the semiconductor materials with the band gap energy smaller than 3.0 eV that can absorb visible light, such as tungsten oxide (WO 3 ), bismuth vanadate (BiVO 4 ), and hematite (α-Fe 2 O 3 ), also have been employed for PEC water splitting [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

β-In2S3 as Water Splitting Photoanodes: Promise and Challenges

Lee

Jang

2021

Electron. Mater. Lett.

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As the interest in sustainable energy production increases, water splitting through semiconductor materials to convert solar energy directly to hydrogen energy has been extensively reported to date. Recently, the III-VI group chalcogenide semiconductors have received great attention for narrow-gap photoelectrochemical (PEC) water splitting electrodes. Among the metal sulfides, beta indium sulfide (β-In 2 S 3 ) shows remarkable properties for photoelectrodes such as high photoelectric sensitivity, high photoconductivity, large photoelectric conversion yield, low toxicity, high absorption coefficient, efficient charge separation, moderate charge transport, appropriate band position, and narrow band gap. Most of its unique properties come from the defective spinel crystal structure. Despite the superior advantages, there is a serious problem of photocorrosion induced by accumulated holes on the surface of the electrodes during the photocatalytic reaction under illumination which reduces the PEC properties. Herein, we review overall physicochemical and optoelectronic properties of β-In 2 S 3 , regardless of pros and cons, followed by the discussion of assorted strategies to further improve the PEC activities.

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Section: Introductionmentioning

confidence: 99%

β-In2S3 as Water Splitting Photoanodes: Promise and Challenges

Lee

Jang

2021

Electron. Mater. Lett.

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“…In order to overcome these undesired intrinsic characteristics, one may modify the photoelectrode. Common approaches for increasing the PEC behavior of materials such as BVO are controlling size and shape of the semiconducting material, doping, forming heterojunctions with other metal oxides or decorating the surface with a catalyst [5,6]. As the OER has a high kinetic energy barrier due to the four-electron water oxidation reaction, it is normally the rate-limiting step of the PEC system.…”

Section: Introductionmentioning

confidence: 99%

Photocurrent improvement from magnetron DC sputtered and thermally treated ruthenium-based catalyst decoration onto BiVO4 photoanodes

Gutierres

Migowski

Alencar

et al. 2021

Nuclear Instruments and Methods in Physics Research Section B:

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“…Semiconductors with staggered band alignments can be coupled to fabricate the heterojunction, which can improve the solar water oxidation of the photoelectrode due to the increased charge carrier separation [7][8][9][10][11]. Nano structural modification with high surface area is beneficial to further improve the photocurrent density of the heterojunctions [12,13].…”

Section: Introductionmentioning

confidence: 99%

Influence of C3N4 Precursors on Photoelectrochemical Behavior of TiO2/C3N4 Photoanode for Solar Water Oxidation

et al. 2020

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Photoelectrochemical water splitting is considered as a long-term solution for the ever-increasing energy demands. Various strategies have been employed to improve the traditional TiO2 photoanode. In this study, TiO2 nanorods were decorated by graphitic carbon nitride (C3N4) derived from different precursors such as thiourea, melamine, and a mixture of thiourea and melamine. Photoelectrochemical activity of TiO2/C3N4 photoanode can be modified by tuning the number of precursors used to synthesize C3N4. C3N4 derived from the mixture of melamine and thiourea in TiO2/C3N4 photoanode showed photocurrent density as high as 2.74 mA/cm2 at 1.23 V vs. RHE. C3N4 synthesized by thiourea showed particle-like morphology, while melamine and melamine with thiourea derived C3N4 yielded two dimensional (2D) nanosheets. Nanosheet-like C3N4 showed higher photoelectrochemical performance than that of particle-like nanostructures as specific surface area, and the redox ability of nanosheets are believed to be superior to particle-like nanostructures. TiO2/C3N4 displayed excellent photostability up to 20 h under continuous illumination. Thiourea plays an important role in enhancing the photoelectrochemical performance of TiO2/C3N4. This study emphasizes the fact that the improved photoelectrochemical performance can be achieved by varying the precursors of C3N4 in TiO2/C3N4 heterojunction. This is the first report to show the influence of C3N4 precursors on photoelectrochemical performance in TiO2/C3N4 systems. This would pave the way to explore different precursors influence on C3N4 with respect to the photoelectrochemical response of TiO2/C3N4 heterojunction photoanode.

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Triple Planar Heterojunction of SnO2/WO3/BiVO4 with Enhanced Photoelectrochemical Performance under Front Illumination

Cited by 19 publications

References 44 publications

β-In2S3 as Water Splitting Photoanodes: Promise and Challenges

β-In2S3 as Water Splitting Photoanodes: Promise and Challenges

Photocurrent improvement from magnetron DC sputtered and thermally treated ruthenium-based catalyst decoration onto BiVO4 photoanodes

Influence of C3N4 Precursors on Photoelectrochemical Behavior of TiO2/C3N4 Photoanode for Solar Water Oxidation

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